Speed-controlling and driving apparatus for variably-loaded working machines



Oct. 13,1925. 1,556,671

M. L. BORCHGREVINK SPEED CONTROLLING AND DRIVING APPARATUS FOR VARIABLYLOADED WORliggi MACHINES I rma- I'ob.

Patented Oct. 13, 1925.

MADs LIE BoIwHGnEvINx,

f SPEED-CONTROLLING AND DRIVING 1 JllIfACIHIN11S. v

or orrnrsriANrA, NORWAY.

APPARATUS FOR VARIABLY-LOAVDED WORKING Application filed February 1,l'szalserial No. 690,035. r

1 To all whom z't may conoem Be it known that :I, LIADS-V'LIE BoizornGREVINK, asubject of the King, ofNorway,

residingat Sofiesgate 60, Chr1stiania, Norway, have invented certain newand useful Improvements in Speed-Controlling and Driving Apparatus forVariably-Loaded Working Machines, of which the following is aspecification.

In mines there are often used ore separators, which includeanarrangement in which great rotating arm crosses or spiders carry, atthe free end thereof, buckets, which buckets when in top positionreceive a charge 1 of ore and then lower the charge when the spiderturns, and finally deliverthe charge when in lowermost position. Whensuch a spider is running idle, the buckets receiving no charge, onlyvery little force is necessary to turn the spider at constant speed.I-Iowever, when the buckets receive ore charges the heavy load of theseveral filled buckets on the one side of the shaft of thespider,

exerts a considerable momentum, and in order that the speed of thespider shall not increase, it has heretofore been necessary to use apowerful motor or prlme mover,

which counteracts the said momentum with out being dragged with thespider. When the spider was running idle the said powerful motor had tobe braked, and thereby considerable energy was lost. 7

The present invention aims at removing this drawback. With this objectthe invention consists of an apparatus which is adapted to drive aspider, or other arrangement of the type said above, at a substantiallyconstant speed, the motor being, however, far less powerful than thosepreviously used, whereby energy is saved.

On the drawing, which shows one embodiment of my invention by way ofexample, Fig. 1 is a side view of the regulation apparatus, and Fig. 2is a top view thereof, partially in sect1on.

The shaft 1 is connected to the machine or other arrangement (notshown), the speed of which is to be controlled, eventually by means of asuitable gearing. The said shaft 1 is journalled in the pedestal 2,suitably by means of a roller-bearing 3. Fast on the shaft 1 is keyed aninternally geared wheel 4:, which thus turn together with the shaft 1.In the hub portion of the said wheel 4 is located a roller bearing 5,which supportsthe end6 of a arranged in alignment withtheshaft 1 andalsosupported: bya pedestal .8. .The'shaft 17 is prevented from turninginthe pedestal 8 and the roller bearing 5, by suitable means, such as asetscrew 9, screwed through a part ,of ithe pedestal 8 into contactwithfthe -sh aftf7.qi

-O-n the stationary shaft 7 is mounted a frame 10, which maybe rotatedon the shaft 7, and one end of which forms the stator 11 of an electricmotor. On the shaft 12 of the armature of the said motor is keyed a gear13, meshing with a gear 14 fast on the stationary shaft 7. The other endof the armature shaft 12 carries, fast thereon,

' a sprocket wheel 15, which through a chain 16 and another sprocketwheel 17, drives a shaft 18, which by means of roller bearings isrotatably mounted in the end of the frame 10 distant from the motor. Theother end of the shaft 18 carries, fast thereon, a gear 7 19, meshingwith the internal gearing of the wheel 4. Current is supplied to themotor in a way well understood in the art, suit-able contact rings 20being arranged upon the shaft 7 and coacting with suitable brushes 21secured to the frame 10.

The frame 10 is carefully balanced on each side of the shaft 7, theweight of the motor and the corresponding part of the frame 10 on oneside of the said shaft counterbalancing the weight of the gears 17 and19, the

shaft 18 and the portion of the frame 10 on that side of the shaft. Ifnecessary suitable weights may besecured to the frame on one end thereofin order to obtain exact balance. The frame 10, instead of beingintegral with the stator of the motor, may be formed to receive anelectric motor of usual construction, which is secured to the frame bysuitable means (not shown).

Having now particularly described and ascertained the nature of my saidinvention, and in what manner the same is to be performed, I declarethat what I claim is:

1. A speed controlling and driving apparatus for variably loaded workingmav paratus for variably loaded working inachines including a mainsupport, a shaft journaled therein, a stationary shaft in the supportand in alinement with the rotatable shaft, a support loosely mounted onthe stationary shaft, a motor rotatably mounted on the support, gearingbetween the motor and the stationary shaft, and motion transmittingmeans for operably connecting the motor with the rotatable shaft.

3. A speed controlling and driving apparatus for variably loaded workingmaehines including a main support, a shaft j'ournaled therein, a wheel,the hub of which is rigid with the shaft while the rim is provided withinternal teeth, a stationary shaft lraviing one end mounted in the motorand the other end operably mounted in the hub of the wheel, a secondarysupport rotatably mounted on the stationary shaft, a motor carried bythe support and including a shaft, gearing between the motor shaft andthe stationary shaft, another shaft mounted in the secondary supportopposite the motor,

-a gear on the last mentioned shaft meshing with the internal teeth ofthe Wheel, and means for operably connecting the last mentioned shaftand the motor shaft.

4. An arrangement as claiined'in claim 3, wherein the means forconnecting the motor shaft and the shaft on the secondary supportinclude sprocket wheels keyed to said shafts, and a chain operatingabout said sprocket wheels. 7

In testimony whereof I. afiixymy signature.

MADS LIE BORGHGR-EVIN-K.

